In your first post, you included the link for the speaker twice and there is no link for the amp. Not sure what amp you bought. When do you hear the crackling sound, is it all the time, or just when the system first turns on? Does the sub produce bass?

the cackling is all the time. the sub produces some bass, not as loud as i expected but that could just be because the only other sub ive ever owned was like 800 watts when i was a little punk bass maniac in high school. but i know the crackling is certainly not right.
thanks for the help,
rob